Type AT

VENTILATION GRILLES, MADE OF ALUMINIUM, WITH INDIVIDUALLY ADJUSTABLE, HORIZONTAL BLADES

Ventilation grille with droplet shaped blades

  • Nominal sizes 150 x 100 - 1200 x 600 mm
  • Volume flow rate range 13 – 2170 l/s or 47 – 7812 m³/h
  • Grille face made of aluminium with powder-coat finish
  • Front border 32 mm
  • Concealed fixing or countersunk holes


Optional equipment and accessories

  • Grille face in RAL CLASSIC colours
  • Installation subframe
  • Attachments for volume flow rate balancing and air direction control
  • Concealed fixing or countersunk holes

AT-A/825×225 00135813_0


  • Application
  • DESCRIPTION

Application

  • Ventilation grille of Type AT as supply air or extract air variant for comfort zones and industrial zones
  • Directed supply air discharge for mixed flow ventilation
  • Blades are adjustable to meet different local requirements
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +4 K
  • For installation in walls, sills and rectangular ducts

Special characteristics

  • Individually adjustable blades
  • Angled front border
  • Concealed fixing, or countersunk holes
  • Optional installation subframe

Nominal sizes

  • Nominal length: 150mm to 1200 mm (50 mm increments)
  • Nominal height: 100 mm up to 600 mm (50 mm increments)


Intermediate sizes upon request

Variants

Front border

  • 32 mm wide


Fixing

  • Countersunk holes
  • X: Without holes (border drilling by customer)
  • S11: Concealed fixings (in combination with installation subframe)

Parts and characteristics

  • Angled front border with chamfered inside edge
  • Individually adjustable, horizontal blades
  • Factory fitted perimeter seal

Attachments

  • AG, D, DG: For volume flow rate balancing and for air direction control

Accessories

  • Installation subframe: For the fast and simple installation of ventilation grilles

Construction features

  • Asymmetrically supported blades

Materials and surfaces

  • Border and blades made of aluminium
  • P3: Border and blades powder-coated, RAL9010:20%
  • P6: Border and blades powder-coated, RAL CLASSIC colour,
    Gloss level: 25%

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

TECHNICAL INFORMATION

  • Function
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE

Functional description

Ventilation grilles are air terminal devices for the supply air and extract air of ventilation and air conditioning systems. They direct the supply air into the room. Ventilation grilles with adjustable blades allow for adapting the discharge direction to the local conditions. The result is a mixed flow ventilation in comfort zones and industrial zones, with good overall room ventilation.

Induction slows the airflow down, i.e. the airflow velocity decreases as the distance from the grille increases. The distance at which the airflow velocity reaches a certain defined value, e.g. 0.2 m/s, is called throw distance. The supply air jet from wall grilles that are installed near the ceiling achieves a larger throw distance than a free jet (from a grille that is not installed near the ceiling). Single grilles, groups of grilles and continuous horizontal runs all achieve different throw distances.

In cooling mode it is necessary to take account of the jet deviation towards the occupied zone, which increases as the supply air to room air temperature difference increases and the discharge velocity decreases. In heating mode the supply air jet deviates towards the ceiling. This has no negative effect on the airflow velocity in the occupied zone, but it may affect the complete ventilation of the room. 

Nominal sizes150 × 100 to 1200 × 600 mm
Minimum volume flow rate13 – 965 l/s or 47 – 3474 m³/h
Maximum volume flow rate, with LWA max. 40 dB(A) without attachments54 – 2170 l/s or 195 – 7812 m³/h
Supply air to room air temperature difference–12 to +4 K

Volume flow rates apply to supply air


Ventilation grilles, rectangular, made of aluminium, for supply and extract air. Aesthetic angled front border with chamfered inside edge Preferably for wall and sill installation but also suitable for rectangular ducts.
Ready-to-install component which consists of a border and individually adjustable, horizontal blades.
Concealed fixing in combination with an installation subframe or countersunk holes for fixing onto an installation surface.
Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • Individually adjustable blades
  • Angled front border
  • Concealed fixing or countersunk holes
  • Optional installation subframe


Materials and surfaces

  • Border and blades made of aluminium
  • P3: Border and blades powder-coated, RAL9010:20%
  • P6: Border and blades powder-coated, RAL CLASSIC colour, Gloss level:25%

Technical data

  • Nominal sizes 150 x 100 to 1200 x 600 mm
  • Minimum volume flow rate (supply air): 11 – 520 l/s or 40 – 1872 m³/h
  • Maximum volume flow rate (supply air), at LWA max. 40 dB(A) without attachments: 54 – 1520 l/s or 195 – 5472 m³/h
  • Supply air to room air temperature difference: –12 to +4 K

 

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051